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Optimum design of retaining structures under seismic loading using adaptive sperm swarm optimization
, Article Structural Engineering and Mechanics ; Volume 81, Issue 1 , 2022 , Pages 93-102 ; 12254568 (ISSN) ; Kalhor, A ; Tehrani, M. S ; Jebeli, M ; Sharif University of Technology
Techno-Press
2022
Abstract
The optimum design of reinforced concrete cantilever retaining walls subjected to seismic loads is an extremely important challenge in structural and geotechnical engineering, especially in seismic zones. This study proposes an adaptive sperm swarm optimization algorithm (ASSO) for economic design of retaining structure under static and seismic loading. The proposed ASSO algorithm utilizes a time-varying velocity damping factor to provide a fine balance between the explorative and exploitative behavior of the original method. In addition, the new method considers a reasonable velocity limitation to avoid the divergence of the sperm movement. The proposed algorithm is benchmarked with a set...
A validated numerical-experimental design methodology for a movable supersonic ejector compressor for waste-heat recovery
, Article Journal of Thermal Science and Engineering Applications ; Volume 6, Issue 2 , Oct , 2014 ; 19485085 (ISSN) ; Persoons, T ; Murray, D. B ; Tehrani, M. S ; Farhanieh, B ; Koehler, J ; Sharif University of Technology
Web Portal ASME (American Society of Mechanical Engineers)
2014
Abstract
The aim of this paper is to develop the technical knowledge, especially the optimum geometries, for the design and manufacturing of a supersonic gas-gas ejector for a wasteheat driven vehicle cooling system. Although several studies have been performed to investigate the effects of geometrical configurations of gas-gas ejectors, a progressive design methodology of an ejector compressor for application to a vehicle cooling system has not yet been described. First, an analytical model for calculation of the ejector optimum geometry for a wide range of operating conditions is developed, using R134a as the working fluid with a rated cooling capacity of 2.5 kW. The maximum values of entrainment...